When the body's blood glucose level rises, the pancreas secretes insulin and, as a result, the blood glucose level declines. When the blood glucose level is low, the pancreas secretes glucagon and, as a result, the blood glucose level rises. Such regulation of the blood glucose level is the result of
A) catalytic feedback
B) positive feedback
C) negative feedback
D) bioinformatic regulation
E) protein-protein interactions
Answer: C